238 
A number of specimens, apparently of this species, were lately 
sold by auction by Mr. Stevens in London, and I regret that I was 
not able to obtain a specimen for description. Major-General Hear- 
sey also collected some of the cases of this species in Central India, 
without, however, obtaining the perfect insect ; from these I find 
that the attenuated extremity of the cases arises from the fact of the 
larva employing the strong spines of the tree upon which it feeds for 
the defence of its case, the points being always directed backwards. 
The minute analysis made in the foregoing pages, and the accom- 
panying plates of twelve species of these case-bearing Moths, enables 
us to form an opinion as to the composition and affinities of the 
group in question, respecting which much diversity of opinion has 
prevailed. With the exception of the characters derived from the 
case-bearing habits of the larvee, the wingless and unwieldy state of 
the female, and the more or less strongly pectinated antennze of the 
males, we find no homogeneousness in the perfect state of the insects ; 
indeed we could scarcely select three moths more unlike each other 
than O. Saundersii, Boisduvalii, and Doubledaii, and almost every 
modern lepidopterist would at once pronounce such variations of form 
to belong to as many different genera. The general shape of the body 
has been seen to vary from a greatly elongated to a short, robust, as 
well as to a short and slender form. The wings in like manner vary 
from the long pointed form to the very short broad proportions of 
O. Boisduvalii. They vary also in being either densely squamose or 
completely hyaline. Their veins also offer considerable variation 
both in situation and in the number of their branches, although we 
may affirm that the narrowness of the base of the discoidal cell, and 
its completely closed state by a vein which is always angulated in the 
middle, the apex of the angle being towards the hase of the wing, 
and the cell itself traversed by one or two slender veinlets, often united 
together into a fork, appear constant characters of the group. The 
antennze also vary in being only semipectinated, like those of the 
Zeuzerze, whilst in others they are completely bipectinated to the tip ; 
the number of joints also varies from twenty-five to upwards of forty ; 
and lastly, the slenderness of the fore legs and the short robust form 
of the hind ones appear to be a good character of the group; but 
this portion of the body offers a striking variation, in consequence of 
the fore tibiee being furnished with a long spine arising from its base, 
of which some of the species are destitute. The nature of the larva- 
case even offers striking variations, since in O. Templetonii and 
Herrichii it is destitute of any extraneous matters fixed on its outside. 
The females also, in the few species in which they have been observed, 
are found to vary in the amount of development of their antennz 
and legs, these organs being almost obsolete in O. Kirdbii, whilst in 
O. Saundersii the legs are well articulated. 
If, with the view of establishing sectional groups, we take the 
semipectinated character of the antennze as a primary distinction, we 
find, that although the males of O. Kirbzi and O. Saundersii agree 
well enough together, in general form, length and narrowness of the 
